Improvement in jurglar-ajuabms



BEST AVAELABLE COPY P. F. L. BURSTALL.

Burglar-Alarm.

No. 206,225. Patented July 23,1878.

WITNESSES ATTORNEYS.

- 'fsmrecr tile-trans STATES Q FFIGE- n ---BEST-AVAL LABLE COP annmrr r.L. BUR-STALL, or MILWAUKEE, \VISCONSIN.

ilzM-PROVEMENT IN uns LA-BPALARM-S- Specification fol-tiling part ofla-Hers Patent No. 2 06, 2 2 5. dated-Inh- 23, 1878; application filedJune s, 1.878.

. To an 167m, "mgy concern "Be-itkno haifI,%PmLnr 1 .lrBuus'rALL, ofliiilwaii ee in'flthecounty=offlllilwaukee and isconsi ave' inventeda-new and "Inuiroretl nrgla Alarm, ot -which the followingispecification:

Burgla alarmshave heretofin'e been made which are brought'dnto action togive an lock-work-or electricity whenthe i1 owtoavhioh. they areattached is uelectrou aguet --lias-. beenused rn1-out-.ot=-action.

any intention to furnish .a

1 illheuoli -lmrglar alarm, ;;eit;hcr portable .or fixed, which aha-y*attachml to Ya ldoorior window,- and be- :co1nes;cperative FbY l-llGfjar-occasioned by an I attempt 'rtoopemthc door- 01 =.w.ind0w. 1 The'-:tlarm'#gmay 1also sheconnected-by wires to a *distantbellzorzother\signahsoas to give the alarm zbyseleetricity,:an(l in that.manner it is *especially;availablefitor attachment to safes.'Ivalsosuseaa;pcculiardcvice for attaching the burglar-alarm =to. a'dooror wi udo'w, which derviee aetsalsoasafastening to the door.

*lllyina'ention consists in clock-work and --hammcr,-vopemt'ed by anescapemeut, to strike argong. 'JEl-healarm isheld out of action by a"horscshoeor othcr permanentmagnet swinging-upon a-pin. A weightisattached to the magnct,so.that any jar will detach the ma gnet i'ronritsarmature and. draw it out of the way and 'pcrmitfithehammer-to operate.The motion ot' theihammer or clock-work is utilized to giveai-is'ign'abat aidistanec by making and breaking -an=fielectricaleircuit to act upon ateleplione'or othcrsignaling device.

The alarmeis-mounted upon a plate or base, which isielampedto a-door bya screw-fastening, whiclneonsistsof. a wedge-plate to pass Betweenthe'door alldilljitllll), andprovid ed with screws for securingthc plateto the ja-mb and a screw to clamp the burglar-alarm to the 'door. By:this means the door is fastened, and any attempt tolopcn it by violencewill cause the alarm to "become operative.

In the din-wing, Figure l is an elevation of my burglar-alarm as set foraction. Fig. 2 is "dc clevatioinin section, at the linemr; and

O (10-51 and means tor clamping the burglaralarm to the door.

- h,- and .Screwsfi,

. is aneleva-tion ot' ,thefastener for the -Simila-rletters'ot'reference indicate corresponding parts.-

a, is the clock-work ortrain of gearing, of an yusual ordesiredcharacter, having en escapement-whecll and 'Ee-pement, 1),operating the hammer e; flfhe .eseape'ment and hammer are connectedwithythe arbor d, which also carries ethe .ro d ,Therod c has upon its,outer e d-the armature f. of the permanent .Ina-gnetg. {Ellis nagu Iich allow the poles of the magnet -to-.= be raised in p osit ion. forholding pp t g isl eldbyalplate,

the -.a-rmati ire f, or bedrawndown clear of the armature .by theweiglitkh mg to the magnet;

illhe. parts are shown as Qmounted upon a wooden or, .otlier nomconduct-ing base, i, so that. theymmay be. insulated; and the base Iissecnred toiathin metal plate, at, adapted to beattached to a door orother place. a is a metal bell .ordrum, attached to the plate m in suchaposition that itma-y be struck by the vhammer c.

The parts described constitute a complete burglarralarm, which may befixed perm anently in positionupona dooror window; or they may .be usedas a portable alarm, in which case I attach them by the vfastening shownin Fig. 3. This consists of an angle-plate, o, havi ng a wedge, 11,which wedge is tobe forced in betwecnthe door. and its frame. The screwsq, with pointed ends, are turned to cause the pointed ends to bindnponthe jamb and pre-.

vent the door being opened except by considerable violence. Theangle-plate 0 also has a screw, r, w bich,whcn the fastening is securedin place, is to be used to clamp the plate m of theburglar-alarm to thedoor. I have shown this clamp in the position it would occupy upontheplate at when the wedge 12 is inserted between the bottom of a door andthe door sill.

The door being secured and the alarm clamped thereto, any attempt toopen the door will cause ajar, and the magnet g will detach itself fromthe armature f, and the weight It will draw the magnet down out of thepath of the armature, and permit the hammer to strike the drum n. Theweight k is' to be proportionedto the strength of the magnet g, so thata slight jar will disconnect the magnet and armature;

taut signaling apparatus.

The weight k is shown as a metal box loaded with small shot and having amovable cover,

' to allow of the weight beingvaried at pleasure to suit the magnet. Insome'cases the weight may be omitted, and the magnet will discounectitself and fall by its own weight. i If it is desired to send an alarmto a distance, the wires shown may be used for thatpurpose. a

s is a wire attached to the hammer-crank c and to the binding-screw t,which bindingscrew t is connected to a battery and the signalingapparatus (not shown) atthe distant point. a is a binding-screw attachedto the drum n, and connected by a wire, 0, to the dis- When the alarm isset in mot-ion at the plaecwhere it is attached, t-hc cont-act of thehammer c with the drum -ncloses the circuit of the wires named andcauses the distant alarm to sound. This alarm may be a bell andlhammcroperated by an electro-magnet of usual construction; or

any other well-known means for givingan alarm by the closing or breakingof an electrical eircuit'may be used. Instead of the hammer closing thecircuit by contact with the drum, the motion ot the train of gearing mayoperate a make-and-breah wheel for opening and closing the circuit.

The burglar-alarm described may be attached to a door, windowgor otherplace to be guarded,-and it is applicable to a safe or vault,

to give notice, atthe place where it is-attaehed and at a distant"point, of any tamper: iug with the safe. It is readily attached a BESTAVAILABLE COP without requiring altcrations'ot' the door or window.

, I do not limit myself to precise construction ot' the parts of thealarm, as shown", as the may be garicd'wit-hout departing from theesseiitial features of my invention.

Having thus described my invention, I claim as new and desire to secureby iietters latentr 1. A permanent magnet, in combination withclock-work and a bell or drum, the magnet serving to hold the alarm outof action when the apparatus is set, and freeing itself .1;om-itsarmature to permit the alarm to sound when jarred or disturbed,substantially as set forth. 4 l 2. Theweight k, in combination with theswinging permanent magnetsubstaiitially 'as- 'turc mechanism 0, c, andf, the ma gniettg', and

bell or drum n, as and for; the purpose setfort-h. Y i

Witnesses: 'E. W. TALLtmix-m;

A.TT.RICIIARDS.

